Dev Tools · 1h ago
Why Hand-Rolling JSON-RPC for MCP Servers Is a Waste of Time
A developer building an MCP server with 8 tools compared hand-rolling JSON-RPC against using FastMCP's decorator API. The low-level path required manual schema registration, argument unpacking, and response wrapping for each tool. FastMCP eliminated all boilerplate, letting the author focus on tool logic.
Meridian48 take
The post is a practical argument for using higher-level abstractions in MCP development, but the real takeaway is that protocol boilerplate can kill developer velocity as tool count grows.
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I Almost Hand-Rolled JSON-RPC for an MCP Server. Eight Tools Later I'm Glad I Didn't. →
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